casual, insouciant, nonchalant -- (marked by blithe unconcern; "an ability to interest casual students"; "showed a casual disregard for cold weather"; "an utterly insouciant financial policy"; "an elegantly insouciant manner"; "drove his car with nonchalant abandon"; "was polite in a teasing nonchalant manner")
casual -- (without or seeming to be without plan or method; offhand; "a casual remark"; "information collected by casual methods and in their spare time")
casual, everyday, daily -- (appropriate for ordinary or routine occasions; "casual clothes"; "everyday clothes")
casual, chance -- (occurring or appearing or singled out by chance; "seek help from casual passers-by"; "a casual meeting"; "a chance occurrence")
casual, cursory, passing, perfunctory -- (hasty and without attention to detail; not thorough; "a casual (or cursory) inspection failed to reveal the house's structural flaws"; "a passing glance"; "perfunctory courtesy")
casual, occasional -- (occurring from time to time; "casual employment"; "a casual correspondence with a former teacher"; "an occasional worker")
fooling, casual -- (characterized by a feeling of irresponsibility; "a broken back is nothing to be casual about; it is no fooling matter")
free-and-easy, casual -- (natural and unstudied; "using their Christian names in a casual way"; "lectured in a free-and-easy style")
casual, effortless -- (not showing effort or strain; "a difficult feat performed with casual mastery"; "careless grace")
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